If 100 octane gas was available.......
Thread Starter
On The Tree
Joined: Dec 2001
Posts: 115
Likes: 0
From: Glassboro NJ
If 100 octane gas was available....... would it cause damage to the engine if used on a daily basis? Unleaded gas of course.
I made a comment on another board that if it was available I would use it all the time. A reply came back saying "it looks like someone wants to burn his valves or pistons".
The LSx engine's recommended fuel is 91 or higher. Would the 100 octane be hurtful or helpful?
Matt
I made a comment on another board that if it was available I would use it all the time. A reply came back saying "it looks like someone wants to burn his valves or pistons".
The LSx engine's recommended fuel is 91 or higher. Would the 100 octane be hurtful or helpful?
Matt
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
I run 98 octane all the time. No damage. I do not see that another 2 octanes would be harmfull. On the contrary since I'm a N2O addict, I'm able to shoot 150 dry on 28* timing and 200 on 26* with TR6's. no issues.
no it wont harm the motor at all... whoever made that comment is ignorant. my advice would be to not take any technical advice from them. 
however, running 100 octane also wont net you any gains unless you're currently seeing detonation or you have a tune requiring more octane
edit:
so my answer is neither. it wont hurt the motor, but it wont help either.
however, running 100 octane also wont net you any gains unless you're currently seeing detonation or you have a tune requiring more octane
edit:
so my answer is neither. it wont hurt the motor, but it wont help either.
Thread Starter
On The Tree
Joined: Dec 2001
Posts: 115
Likes: 0
From: Glassboro NJ
Thanks guys
I had a very strong feeling that it would not harm anything but my wallet. But I had to ask to ahhh.....feel better about my knowledge of engines.
The LS1GTO site was a place I thought would have a more muture membership. Alas, I was wrong.
I feel like a newbie on this site. Been here since Dec 01 and have less then 100 posts!!!! I do read it more then the post count implies.
Matt Sr.
I had a very strong feeling that it would not harm anything but my wallet. But I had to ask to ahhh.....feel better about my knowledge of engines.
The LS1GTO site was a place I thought would have a more muture membership. Alas, I was wrong.
I feel like a newbie on this site. Been here since Dec 01 and have less then 100 posts!!!! I do read it more then the post count implies.
Matt Sr.
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Even if it was avalible, it would be pointless unless you tuned your computer to use it. Your car would probablly also make less power. Motors make the most HP at the point just before detonation, so if your motor dosen't detonate with 89 octane, then jacking the octane to 98 would drag you that much farther from detonation, which would drag you that much farther from peak HP. If you tune it to use the ocatane, then that's a diffrent story. Sounds like PREDATOR-Z did it right.
On The Tree
Joined: Oct 2003
Posts: 125
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Originally Posted by PREDATOR-Z
I run 98 octane all the time. No damage. I do not see that another 2 octanes would be harmfull. On the contrary since I'm a N2O addict, I'm able to shoot 150 dry on 28* timing and 200 on 26* with TR6's. no issues.
Mahmood
it would absolutly not smell better. you are smelling the lead in the racegas that makes it sweet- 100 unleaded would smell no different than 93 unleaded or 87 unleaded.
i wish it was at pumps. i know i could make use of it, but obviously just putting it in your car would not net any gains.
burning a valve? not even leaded gas will do that. that person is a tool.
i wish it was at pumps. i know i could make use of it, but obviously just putting it in your car would not net any gains.
burning a valve? not even leaded gas will do that. that person is a tool.
Originally Posted by CTSmechanic
The 76 stations here in Vegas sell 100 for awhile 100 was ony 1.25 more a gallon...than premium @4.50 a gallon your wallet will deffently be lighter
I pay like $1.90 here for 93.
TECH Enthusiast
Joined: Apr 2003
Posts: 561
Likes: 0
From: silver Spring MD
Hi Folks
In Maryland Sunoco sells unleaded 100 and 104 octane Racing fuel. They recommend using the 104 if you have a CR of 12.1:1 dome piston and 14.1:1 disk. you can get and it will be costly.
Bill
In Maryland Sunoco sells unleaded 100 and 104 octane Racing fuel. They recommend using the 104 if you have a CR of 12.1:1 dome piston and 14.1:1 disk. you can get and it will be costly.
Bill
100 octane unleaded is the most common.....
100 octane low lead is aviation fuel and has a different burn rate......
Unless you are running 12:1+ I don't think 100 octane is needed. Depending upon cam some guys are running 12:1 on 93 octane.
When I would run 116 leaded race fuel in my turbo car the "sweet smell" was there. At $8.50/gallon I hope it smells a little different
-GNX7
100 octane low lead is aviation fuel and has a different burn rate......
Unless you are running 12:1+ I don't think 100 octane is needed. Depending upon cam some guys are running 12:1 on 93 octane.
When I would run 116 leaded race fuel in my turbo car the "sweet smell" was there. At $8.50/gallon I hope it smells a little different
-GNX7
Originally Posted by sleeperstyle
it would absolutly not smell better. you are smelling the lead in the racegas that makes it sweet- 100 unleaded would smell no different than 93 unleaded or 87 unleaded.
Originally Posted by 01TAFlyer
So you pay $3.25 per gallon for gas?
I pay like $1.90 here for 93.
I pay like $1.90 here for 93.
100 octane If you don't need a higher octane don't use it. I work in a refinery, when we blend gasoline we run a knock engine as we are blending. When we blend premium gasoline we find alot more carbon on the head and piston top after the blending. The motor runs off of a random stream taken from the blend line. The motor is used to adjust the octane level of the blend. So if you don't need it don't use it unless you like carbon build up.